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Chapter 1:
Introduction
Cascaded Integrator-Comb (CIC) filters, also known as Hogenauer filters, are used to achieve arbitrary and large
sample rate changes in digital systems. These filters are used as decimation or interpolation filters and can be effi-
ciently implemented without multipliers, utilizing only adders and subtractors.
A CIC filter is typically used in applications where the system sample rate is much larger than the bandwidth occu-
pied by the signal. They are commonly used to build Digital Down Converters (DDCs) and Digital Up Converters
(DUCs). Some applications that use the CIC filter include software design radios, cable modems, satellite receiv-
ers, 3G base stations, and radar systems.
Lattice provides a widely parameterizable CIC filter that supports multiple channels with run-time programmable
rates and differential delay parameters.
Quick Facts
Table 1-1 through Table 1-8 give quick facts about the CIC Filter IP core for LatticeECP?, LatticeECP2?,
LattceECP2M?, LatticeECP3?, LattticeSC?, LatticeSCM?, LatticeXP?, and LatticeXP2? devices.
Table 1-1. CIC Filter IP Core for LatticeECP Devices Quick Facts
CIC IP Configuration
Decimator with rate
is 48 and data with is
8 and stage is 4
Decimator with rate is
4096 and data with is
16 and stage is 8
Interpolator with rate
is 35 and data with is
15 and stage is 7
Core ?
FPGA Families Supported
Lattice ECP
Requirements
Minimal Device Needed
LFEC1E
LFEC3E
LFEC3E
Targeted Device
LFECP33E-5F672C
Resource ?
Utilization
LUTs
sysMEM EBRs
Registers
218
0
301
1514
0
1253
878
0
1982
Lattice Implementation
Diamond ? 1.0 or ispLEVER ? 8.1
Design Tool ?
Support
Synthesis
Simulation
Synopsys ? Synplify Pro ? for Lattice D-2009.12L-1
Aldec ? Active-HDL ? 8.2 Lattice Edition
Mentor Graphics ? ModelSim ? SE 6.3F
IPUG42_02.6, August 2010
4
Cascaded Integrator-Comb (CIC) Filter User’s Guide
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相关代理商/技术参数
CIC-FILT-XM-U2 功能描述:开发软件 Cascaded Integrator Comb Filter RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
CIC-FILT-XM-UT2 制造商:Lattice Semiconductor Corporation 功能描述:
CICG100B560 制造商:Thomas & Betts 功能描述:Connector Accessories Cord Connector Steel
CICG100B750 制造商:Thomas & Betts 功能描述:Connector Accessories Cord Connector Steel
CICG100B850 制造商:Thomas & Betts 功能描述:Connector Accessories Cord Connector Steel
CICG100C1050 制造商:Thomas & Betts 功能描述:Connector Accessories Cord Connector Steel
CICG100C950 制造商:Thomas & Betts 功能描述:Connector Accessories Cord Connector Steel
CICG125C950 制造商:Thomas & Betts 功能描述:Connector Accessories Cord Connector Steel